?RCS: $Id$
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS:
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: $Log: d_flexfnam.U,v $
?RCS: Revision 3.0  1993/08/18  12:06:04  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:d_flexfnam: cat rm test Setvar
?MAKE:	-pick add $@ %<
?S:d_flexfnam:
?S:	This variable conditionally defines the FLEXFILENAMES symbol, which
?S:	indicates that the system supports filenames longer than 14 characters.
?S:.
?C:FLEXFILENAMES:
?C:	This symbol, if defined, indicates that the system supports filenames
?C:	longer than 14 characters.
?C:.
?H:#$d_flexfnam	FLEXFILENAMES		/**/
?H:.
?T:first second tmpdir
?LINT:set d_flexfnam
?LINT:extern TMPDIR
: see if we can have long filenames
echo " "
?X:
?X: We have to test in both /tmp and . because of NFS (remote server may allow
?X: long filenames while the local filesystem cannot support them). If at least
?X: one of those file systems cannot support long filenames, then we assume the
?X: whole system can't.
?X:
tmpdir="${TMPDIR:-/tmp}"
rmlist="$rmlist $tmpdir/cf$$"
$test -d "$tmpdir/cf$$" || mkdir "$tmpdir/cf$$"
first=123456789abcdef
second="$tmpdir/cf$$/$first"
$rm -f $first $second
if (echo hi >$first) 2>/dev/null; then
	if $test -f 123456789abcde; then
		echo 'You cannot have filenames longer than 14 characters.  Sigh.' >&4
		val="$undef"
	else
		if (echo hi >$second) 2>/dev/null; then
			if $test -f "$tmpdir/cf$$/123456789abcde"; then
				$cat <<'EOM'
That's peculiar... You can have filenames longer than 14 characters, but only
on some of the filesystems.  Maybe you are using NFS.  Anyway, to avoid problems
I shall consider your system cannot support long filenames at all.
EOM
				val="$undef"
			else
				echo 'You can have filenames longer than 14 characters.' >&4
				val="$define"
			fi
		else
			$cat <<'EOM'
How confusing! Some of your filesystems are sane enough to allow filenames
longer than 14 characters but some others like /tmp can't even think about them.
So, for now on, I shall assume your kernel does not allow them at all.
EOM
			val="$undef"
		fi
	fi
else
	$cat <<'EOM'
You can't have filenames longer than 14 chars.  You can't even think about them!
EOM
	val="$undef"
fi 
set d_flexfnam
eval $setvar
$rm -rf "$tmpdir/cf$$" 123456789abcde*